Adjustable sieve.



C. GLOSZ.

ADJUSTABLE SIEVE. APPLmA'rIoN FILED JUNE 3,1909.

909,757. Patented Jan. 12, 1909.

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CHARLES CLOSZ, OF WEBSTER CITY, IOWA.

ADJUSTABLE SIEVE.

Specification of Letters Patent.

Patented Jan. 12, 1909.

Application filed June 3, 1908. Serial No. 436,425.

To all whom it may concern:

Be it known that I, CHARLES CLosz, a citizen of the United States,residing at Webster City, in the county of Hamilton and State of Iowa,have invented certain new and useful Improvements in Adjustable Sieves;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My present invention relates particularly to that class of adjustablesieves that are made of overlapped sheet metal sections constructed andarranged substantially as shown in my prior patent #873,719, of dateDecember 17, 1907, entitled Adjustable sieve.

Sieves of the character herein illustrated and claimed are especiallyadapted, under certain adjustments, to separate wheat and other grainsfrom chaff, short straw, white caps, etc., and under other adjustmentsto Separate small seeds, like timothy seeds, from heads, husks, brokenstems and the like.

Especially this invention is directed to the provision of improved meansfor adjustably setting and holding the sieve sections in differentoperative positions, but the invention is also directed to theimprovement of the sieve sections themselves.

The invention is illustrated in the accompanying drawings, wherein likecharacters indicate like parts throughout the several views.

Referring to the drawings, Figure 1 is a plan view of the improved sieveand. adjusting device. Fig. 2 is a vertical longitudinal section takenon the line x2 x2 of Fig. 1. Fig. 3 is a plan view showing one of thesections of the adjustable sieve, some parts being broken away and someparts being removed. Fig. l is a section taken on the line m4 act ofFig. 8. Fig. 5 is a detail in plan, with some parts broken away, showingthe frictional coupling for adjustably setting the several sections indifferent working positions. Fig. 6 is a side elevation, showing thedetachable coupling for connecting the adjusting rod to the cooperatingadjusting lever; and Fig. 7 is a section taken on the line :v7 x7 ofFig. 5.

The numeral 1 indicates a rectangular supporting frame of a sieve, thesame, as shown, having a central bar la.

The numeral 2 indicates the metallic slats or sections of the sieve,which sections are secured to rock shafts 3, are suitably mounted in thesides of the frame, and are provided with U-shaped cranks 4C at theircentral portions. A pushbar 5 pivotally connects the cranks l and isitself pivotally connected, at 5a, to a link or crank rod 6. The outerend of the link 6 is pivotally connected to the eccentrically locatedcrank pin 7 of a crank lever or eccentric 8. This crank lever 8 ispreferably constructed of flat `sheet metal and is pivotally connectedat 9 to a bearing plate 10, which latter, as shown, is rigidly securedto the under surface of the transverse lower bar of the frame 1. Thecrank pin 7 has an enlarged head 7a that directly engages the undersurface of the outer end of the link 6, and the said link is shown asprovided with a stop linger 6a that is adapted to engage the lever 8 tolimit the movement of said lever in a direction which opens up thesections of the sieve.

The crank pin 7 is passed through a friction plate 11 and through a flatspring 12, which parts are interposed between the link 6 and the lever 8and directly engage, respectively, with the said parts 6 and 8. rThefriction plate 11 has laterally bent end lugs 112L that embrace thespring 12 andthe inner end of the lever 8 and thus hold the said parts8, 11 and 12 for common oscillatory movements. The force of the saidspring 12 causes the outer end of the link 6 to be frictionally clampedbetween the said friction plate 11 and the head 7a of the crank pin 7,and this friction, with a spring of proper tension, will serve to holdthe link 6 and lever 8 in any such adjustments, and this in turn willserve to frictionally hold the sections of the sieve in any of theirseveral working positions.

As a convenient means for moving the lever 8 from one side of the sieve,an operating rod 13 is, as shown, extended through a side board 1bsecured to one side of the frame 1 and is provided, at its outer end,

with a hand-piece 14, while at its inner endy it is bent laterally at13a and pivotally connected to the free end of the crank lever 8.

To detachably connect thesaid rod 13 to the said lever 8, a couplinghead 15 is slidably mounted on the inner end of the rod 13 and isyieldingly pressed inward by a 'of the sieve sections, below coiledspring 16, anchored to said rod at its outer end. This coupling head 15is provided with a bifurcated inwardly projecting flange 15a thatnormally underlies the end of the lever 8 and straddles the dependingend 13a of the rod 13. IVhen this coupling head 15 is forced outwardagainst the tension of the spring 16 far enough to carry this bifurcatedflange 15a beyond the edge of the lever 8, the bent end of the rod 13may be easily detached from said lever. This coupling head 15 isnormally spring-pressed against the lever 8 so that there will be norattling of the parts.

In the present application, as in my prior patent above identified, theslats 2 are corrugated, and between the corrugations, at their forwardprojecting raised portions of the said corrugations in the form ofprojectingyli'ngers. Those portions of the slats 2 that extend rearwardof the respective rock shafts are bent downward at an angle with respectto the corresponding finger port-ions. To the front and rear bars of theframe 1 are rigidly secured other metallic slats 17 and 18, the formerof which has no notches and the latter of which is provided withvfingers and notches of the character alreadyV indicated.

In each Slat, immediately over its rock shaft 3, is a main or primarydividing ridge 19, and on the intermediate portion of the rearwardlyinclined section of each slat is a raised so-called secondary dividingridge 20. By reference to Fig. 4 it will be noted that the rear portionsof the slats which are at the rear of the so-calledV secondary dividingridges 20 are formed with depressions 201. In the construction so fardescribed,

the said slats are substantially identical with those shown in my saidprior patent, the rear edge portions of the slats are extended rearwardand downward on a curved line,y at 21, and are then bent under andforward and attached, by solder or otherwise, to the respective rockshafts 3. These downwardly curved portions 21 extend for a considerable`distance beyond the depressions 20a and they serve to direct upwardthrough the sieve surface made up of the several slats, blasts of airfrom the main blast, which, in practice, is blown in a forwardlydirection under the sieve. By reference to Fig. 2 it will be noted thateven when the sieve sections are closed, as indicated by full lines, thedownwardly extended portions 21 project far below the sieve surface sothat they will insure upward currents of air through the sieve surface.These upward currents of air through the sieve surface are essential tothe proper separating action and, hence, Vit will downward extensions 21 of the rear portions the secondary ridges 2O and depressions 20,constitute an Vshafts supporting said slats,

be understood lthat the important feature of improvement over theconstruction shown in Vmyv said prior patent.

What- I claiinis:

1. The combination with a sieve made up of a plurality of overlappingoscillatory slats, of means for adjusting said slats comprising a pushbar connecting said slats for common oscillatory movements, ahand-piece, and a connection between said hand-piece and push bar,including a frictional coupling or device arranged to frictionally holdsaid slats in different positions, substantially as described.

2. The combination with a sieve made up of a plurality of overlappingslats, of rock necting said rock shafts for common oscillatorymovements, a crank lever, a link connected at one end to said push bar,a frictional coupling connecting the other end of said link to saidcrank lever, and an operating rod connected to the free end of saidcrank lever, substantially as described. Y

3. In a sieve,the combination with a frame, of a sieve surface made upof a plurality of overlapping slats, crank-equipped rock shafts mountedin said frame and to which said slats Vare secured, a push barconnecting the cranks of said rock shafts, -a crank lever pivoted tosaid frame a link pivoted at one end to said push bar, and a frictionalcoupling connecting the other end of said link to a push bar con-- saidcrank lever and serving to frictiona'lly hold said slats in differentadjustments, substantially as described. e

4. The combination with a sieve frame, of a sieve surface made up of aplurality of overlapped slats, crank-equipped rock shafts mounted insaid frame and to which said slats are secured, a push bar connectingthe cranks of said rock shafts, a crank lever pivoted to one of thetransverse end bars of said frame, a link pivotally connected to saidfpush bar at one end, a frictional spring coupling connecting the otherend of said link to said crank lever, and an operating rod pivotallyconnected to the other end of said crank lever and extending to one sideof said frame, substantially as described.

5. The combination with `a sieve made up of a plurality of overlappingslats, of means for adjusting said slats comprising a pivoted lever andan operating rod, the said operating rod having a spring-pressed clampdetachably pivoting one end thereof to said lever, substantially asdescribed.

6. The combination with a sieve frame and a sieve surface made up of aplurality of overlapping slats, of crank-equipped rock shafts mounted insaid frame and to which` said slats are secured, a ypush bar connectingvided with a hand-piece located at one side of said frame, and aspring-pressed coupling head slidably mounted on said rod and having abifurcated end flange arranged to embrace the end of said rod andthereby detachably hold the same pivotally coupled to said lever,substantially as described.

7. A sieve made up of a plurality of overlapping slats having at theiroverlapping forward edges linger portions and intervening notches, andwhich slats are formed with primary and secondary dividing ridges andwith depressions between said ridges and at the rear of said secondaryridges, andV are further provided with down-turned rear 15 In testimonywhereof l afiiX my signature 20 in presence of two witnesses.

CHARLES CLOSZ.

Witnesses:

C. A. BIERNATZKI, l. I. CLosz.

